Abstract
An on-chip multi-channel visible light communication (VLC) system is realized
through a blue (450 nm) GaN-based micron-size light-emitting diode (μLED)
array integrated with complementary metal-oxide-semiconductor (CMOS) electronics. When
driven by a custom-made CMOS driving board with 16 independent parallel data input
ports, this μLED array device is computer controllable via a standard USB
interface and is capable of delivering high speed parallel data streams for VLC. A total
maximum error-free data transmission rate of 1.5 Gbit/s is achieved over free space by
modulating four μLED pixels simultaneously using an on-off key non-return to
zero modulation scheme. Electrical and optical crosstalk of the system has also been
investigated in detail and the further optimization of CMOS design to minimize the
crosstalk is proposed.
© 2013 IEEE
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